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' as 0.28 mg/kg. The laboratory analysis did not detect an other petroleum constituents . g rY Y Y including TPH-g, TPH-d, benzene, toluene or ethylbenzene. • June 1999 - Four additional soil borings (P-6 through P-9) were advanced at the site to assess petroleum hydrocarbon-impact encountered during the July 1998 UST removal activities. Laboratory analysis of the 40 foot P-8 soil sample detected significant TPH-g at a concentration of 340 mg/kg,TPH-d at a concentration of 37 mg/kg and BTEX compounds at concentrations as high as 20 mg/kg;residual BTEX compounds and MTBE were detected in soil samples collected from P-6 ata depth of 40 feet bsg at concentrations as high as 0.019 mg/kg. Results of the June 1999 investigation were reported in Preliminary Investigation and Evaluation Report, dated 27 September 1999, prepared by AGE. ' February 2000- Ground water monitoring wells MW-1, MW-2 and MW-3 were installed at the site to assess the lateral and vertical extent of petroleum-impacted soil and ground ' water. Laboratory analysis of MW-2 and MW-3 soil samples collected during drilling activities detected TPH-g at concentration as high as 68,TPH-d at concentrations as high as 480 mg/kg and BTEX compounds at concentrations as high as 1.8 mg/kg;low concentrations of MTBE were detected in MW-1,MW-2 and MW-3 soil samples at concentrations as high as 0.89 mg/kg. No other fuel components were detected in soil samples by laboratory analysis. Results of the February 2000 investigation were reported in Ground Water Monitoring Well Installation Report - I S' Quarter 2000, dated 24 April 2000 prepared by AGE. 1 • November and December 2000 - AGE conducted a sensitive receptor survey to locate • potential vertical conduits within a 2,000 foot radius of the site. The results of the sensitive receptor survey did not locate any municipal water wells within 2,000 feet of the site, ' however, several domestic, irrigation and industrial water wells were located within 2,000 feet of the site.Results of the investigation were reported in Sensitive Receptor Survey dated 08 September 2000 prepared by AGE. • January 2002 -Three soil borings (P-10, P-11 and P-12) and one ground water monitoring well(MW-4)were installed at the site to assess the lateral and vertical extent of petroleum- impacted soil and ground water. Laboratory analysis of MW-2 and MW-3 soil samples ' collected during drilling activities detected TPH-g and TPH-d at concentrations as high as 480 mg/kg; BTEX compounds were detected in MW-2 and MW-3 soil samples at concentrations as high as 1.8 mg/kg;MTBE was detected in MW-1,MW-2 and MW-3 soil samples at concentrations as high as 0.89 mg/kg. No other fuel components were detected in soil samples by laboratory analysis. Results of the February 2000 investigation were reported in Ground Water Monitoring Well Installation Report-I'Quarter 2000, dated 24 April 2000 prepared by AGE. Between February 2000 and July 2002, nine ground water monitoring events were performed at wells'MW-1`througli MW-4 TPH-g and BTEX compounds were generally detected from well _ MW-2 at concentrations as high 490 micrograms per liter(µg/1) and 21 4g11, respectively; TPH-d ' was generally detected from wells MW-1 through MW-4 at concentrations as high as 430 (µg/l). Low concentrations of MTBE were generally detected from wells MW-1 and MW-2 at • Advanced GeoEnvironmental,Inc.